21m^2-129m+120=0

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Solution for 21m^2-129m+120=0 equation:


Simplifying
21m2 + -129m + 120 = 0

Reorder the terms:
120 + -129m + 21m2 = 0

Solving
120 + -129m + 21m2 = 0

Solving for variable 'm'.

Factor out the Greatest Common Factor (GCF), '3'.
3(40 + -43m + 7m2) = 0

Factor a trinomial.
3((8 + -7m)(5 + -1m)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(8 + -7m)' equal to zero and attempt to solve: Simplifying 8 + -7m = 0 Solving 8 + -7m = 0 Move all terms containing m to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -7m = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -7m = 0 + -8 -7m = 0 + -8 Combine like terms: 0 + -8 = -8 -7m = -8 Divide each side by '-7'. m = 1.142857143 Simplifying m = 1.142857143

Subproblem 2

Set the factor '(5 + -1m)' equal to zero and attempt to solve: Simplifying 5 + -1m = 0 Solving 5 + -1m = 0 Move all terms containing m to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1m = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1m = 0 + -5 -1m = 0 + -5 Combine like terms: 0 + -5 = -5 -1m = -5 Divide each side by '-1'. m = 5 Simplifying m = 5

Solution

m = {1.142857143, 5}

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